Multiple choice

The average weight of $15$ Oarsmen in a boat is increased by $1.6$ kg when one of the crew, who weigh $42$ kg is replaced by a new man. Find the weight of the new man (in kg).

  1. $65$
  2. $66$
  3. $43$
  4. $67$
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B Correct answer
Explanation

Total weight increase = 15 * 1.6 = 24 kg. The new man's weight = old man's weight + total increase = 42 + 24 = 66 kg.

AI explanation

When the new man replaces the 42 kg oarsman, the total weight of the 15 oarsmen increases to maintain the 1.6 kg rise in the average. The total increase in weight is calculated as 15 multiplied by 1.6 kg, which equals 24 kg. Therefore, the weight of the new man is the original 42 kg plus this 24 kg increase, resulting in 66 kg. The weight of the new man is 66 kg.

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